Cognitive

Pertaining to the mental processes of perceiving, thinking, and remembering; used loosely to refer to intellectual functions as opposed to physical functions.

Autonomic Nervous System

The system regulates certain body processes, such as blood pressure, heart rate, body temperature, digestion, metabolism, balance of water, balance of electrolytes and the rate of breathing. This system works automatically (autonomously), without a person’s conscious effort.

Aura

A warning before a seizure; a simple partial seizure occuring within seconds before a complex partial or secondarily generalized tonic-clonic seizure, or it may occur alone; also a warning before a migraine headache.

Atypical absence seizure

A staring spell characterized by partial impairment of consciousness; often occurs in children with the Lennox-Gastaut syndrome; the EEG shows slow (less than 3 per second) spike-and-wave discharges.